Yes, when designed correctly. Food-grade platinum-cured silicone, which is the standard material at Angies Boutique for brands like Eyce, LIT Silicone, and Waxmaid, tolerates continuous use up to about 450F and brief exposure higher. A standard butane lighter flame applied to a packed bowl heats the herb itself, not the silicone walls, so the surrounding pipe stays well below the silicone's tolerance. The bowl insert is almost always a removable glass or aluminum component that directly contacts the flame, isolating the silicone from heat. Problems only arise with butane torches used for dabbing, which can scorch the silicone if held against it. For normal flower smoking, silicone pipes are completely safe. Cheap knockoff silicone pipes made from tin-cured or unregulated silicone can off-gas at lower temperatures and may leach chemicals into the smoke, which is why Angies Boutique only stocks pipes from brands that publish their material certifications. If you smell a chemical or rubbery odor when heating a new silicone pipe, return it immediately. Reputable platinum-cured silicone pipes have no taste, no smell, and no off-gassing under normal smoking temperatures, even after years of daily use.